<template>
  <div class="add">
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
      <!-- 提示区 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>
      <!-- 步骤条 -->
      <el-steps :active="activeIndex - 0" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品照片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- 添加表单信息页 -->
      <el-form
        :model="addForm"
        :rules="addFormRoles"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <!-- 标签页 -->
        <el-tabs
          :tab-position="'left'"
          v-model="activeIndex"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <!-- 渲染基本信息表单项 -->
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price" type="number">
              <el-input v-model="addForm.goods_price"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weigth" type="number">
              <el-input v-model="addForm.goods_weigth"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number" type="number">
              <el-input v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat" type="number">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="catelist"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <!-- 渲染商品参数表单项 -->
          <el-tab-pane label="商品参数" name="1">
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <!-- 复选框 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                  border
                ></el-checkbox> </el-checkbox-group
            ></el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <!-- 渲染商品属性表单项 -->
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- 渲染商品上传图片表单 -->
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <!-- 渲染商品内容表单页面 -->
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品的按钮 -->
            <el-button type="primary" class="btnAdd" @click="addGoods"
              >添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览对话框 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt="" class="previeImg" />
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'

export default {
  name: 'Add',
  data() {
    return {
      // 步骤条索引
      activeIndex: '0',
      //添加商品的表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weigth: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        //商品的详情
        goods_introduce: '',
        attrs: [],
      },
      addFormRoles: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' },
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' },
        ],
        goods_weigth: [
          { required: true, message: '请输入商品重量', trigger: 'blur' },
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' },
        ],
        goods_cat: [
          { required: true, message: '请输入商品数量', trigger: 'blur' },
        ],
      },
      //商品分类数据列表
      catelist: [],
      //级联数据
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        drildren: 'children',
        expandTrigger: 'hover',
      },
      //动态参数的数据
      manyTableData: [],
      //静态属性数据
      onlyTableData: [],
      //   上传商品图片保存地址
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      //手动绑定请求头,配置upload组件axios中的请求头
      headerObj: {
        Authorization: window.sessionStorage.getItem('token'),
      },
      //图片预览保存路径
      previewPath: '',
      //图片预览是对话框
      previewVisible: false,
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    },
  },
  created() {
    this.getCateList()
  },
  methods: {
    //////////////////////////////////事件监听////////////////////////////////////////
    //级联选择框选择变化时触发这个函数
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    //控制标签页的切换
    beforeTabLeave(activeName, oldActiveName) {
      //   console.log(oldActiveName)
      //   console.log(activeName)
      if (oldActiveName === 0 || this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    //处理图片预览事件
    handlePreview(file) {
      //   console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    //点击删除图片事件
    handleRemove(file) {
      //   console.log(file)
      //先获取图片临时路径，然后根据索引删除
      const filePath = file.response.data.tmp_path
      const i = this.addForm.pics.findIndex((x) => x.pic === filePath)
      //   console.log(i)
      this.addForm.pics.splice(i, 1)
      //   console.log(this.addForm)
    },
    //图片上传成功的钩子函数
    handleSuccess(response) {
      //   console.log(response)
      //上传成功先拼接图片信息对象，然后push数据
      const picInfo = {
        pic: response.data.tmp_path,
      }
      this.addForm.pics.push(picInfo)
      //   console.log(this.addForm)
    },
    //添加商品,预校验
    addGoods() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项！')
        }
        //执行添加业务逻辑////////////////////////////////////////////////////////////////////////////////多看
        //级联选择器双星绑定goods_cat必须是数组，预校验提交数据必须是以逗号分割的字符串
        //这里需要用到lodash进行深拷贝 cloneDeep(obj)
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // console.log(form)
        // console.log(this.addForm)
        //处理动态参数
        this.manyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' '),
          }
          this.addForm.attrs.push(newInfo)
        })
        //处理静态参数
        this.onlyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals,
          }
          this.addForm.attrs.push(newInfo)
        })
        //合并
        form.attrs = this.addForm.attrs
        // console.log(form)
        //最后把拷贝出的form提交服务器，发起添加商品请求
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败!')
        }
        this.$message.success('添加商品成功！')
        this.$router.push('/goods')
      })
    },
    //////////////////////////////////数据处理//////////////////////////////////////////
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败！')
      }
      this.catelist = res.data
      //   console.log(this.catelist)
    },
    //切换菜单获取商品参数
    async tabClicked() {
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: 'many' } }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态列表失败！')
        }
        // console.log(res.data)
        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: 'only' } }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性失败！')
        }
        // console.log(res.data)
        this.onlyTableData = res.data
      }
    },
  },
}
</script>

<style scoped>
.el-step__title {
  font-size: 12px;
}
.el-checkbox {
  margin: 0;
}
.previeImg {
  width: 100%;
}
.btnAdd {
  margin-top: 10px;
}
</style>